Siemens SINUMERIK 840D sl Function Manual page 2040

Detailed Description
2.1 Various interface signals and functions (A2)
DB31, ...
DBX61.3 Followup mode active
Edge evaluation: no
Signal state 1 or The control signals that the followup mode for the axis/spindle is not active.
edge change
Prerequisites for this are:
0 → 1
•
•
The position setpoint continually tracks the actual value while the follow-up mode is active.
Zero speed and clamping monitoring are not active.
Signal state 0 or The control signals that followup mode for the axis/spindle is not active.
edge change Zero speed and clamping monitoring are active.
1 → 0 This means that the above specified prerequisites are not fulfilled.
In the "hold" state, the interface signal:
DB31, ... DBX61.3 (follow-up mode active)
is 0.
Special cases, Notice:
errors, .... A delete distancetogo is triggered internally in the control on transition from "Follow up" to "Hold" (IS
"Followup mode" = 0) or in the closed-loop control mode (IS "Controller enable" = 1).
Corresponding to .... DB31, ... DBX2.1 (controller enable)
DB31, ... DBX1.4 (follow-up mode!)
Additional references /DA/ Diagnostics Guide
DB31, ...
DBX61.4 Axis/spindle stops
Edge evaluation: no
Signal state 1 or The current speed of the axis or the actual number of rotations of the spindle lies under the limit
edge change given by the machine data:
0 → 1 MD36060 $MA_STANDSTILL_VELO_TOL
(Maximum speed/number of rotations for signal "Axis/Spindle stationary").
Signal state 0 or The actual velocity of the axis or the actual spindle speed is greater than the value specified in the
edge change MD (standstill/zero speed range).
1 → 0
If a travel command is present, e.g. for a spindle, then the signal is always = 0 - even if the actual
speed lies below that specified in MD36060.
When the interface signal:
DB31, ... DBX61.4 (axis/spindle stationary)
is signaled and there is no closed-loop position control active for the spindle, then at the MMC, an
actual speed of zero is displayed and with the system variable $AA_S[n] zero is read.
Application Enable signal for opening a protective device (e.g. open door).
example(s)
The workpiece chuck or the tool clamping device is only opened when the spindle is stationary.
The oscillation mode can be switched-in during gear stage change after the spindle has been
braked down to standstill.
The tool clamping device must have been closed before the spindle can be accelerated.
Corresponding to .... MD36060 $MA_STANDSTILL_VELO_TOL
(maximum velocity/speed for signal "Axis/spindle stationary")
44
Signal(s) updated: cyclic
The controller enable for the drive has been withdrawn (either by the PLC with "controller enable
" = 0 signal or inside the control for faults; refer to the references)
Follow-up operation is selected (either by the PLC with IS "follow-up operation" = 1 signal or in
the control, e.g. when withdrawing the controller enable from an axis that is moving)
Signal(s) updated: cyclic
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0